Belt buckle



FIG. 1 is a front elevational view of a belt buckle showing my new design;

FIG. 2 is a top plan elevational view thereof;

FIG. 3 is a bottom plan elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a left-side elevational view thereof; and

FIG. 6 is a right-side view thereof. 

The ornamental design for belt buckle, as shown and described. 